hotfix: Allow sale_amount product updates (#346)

integration-tests/api/__tests__/admin/product.js

@@ -173,12 +173,18 @@ describe("/admin/products", () => {
       );
     });
 
-    it("updates a product (update tags, delete collection, delete type, replaces images)", async () => {
+    it("updates a product (update prices, tags, delete collection, delete type, replaces images)", async () => {
       const api = useApi();
 
       const payload = {
         collection_id: null,
         type: null,
+        variants: [
+          {
+            id: "test-variant",
+            prices: [{ currency_code: "usd", amount: 100, sale_amount: 75 }],
+          },
+        ],
         tags: [{ value: "123" }],
         images: ["test-image-2.png"],
         type: { value: "test-type-2" },
@@ -209,6 +215,16 @@ describe("/admin/products", () => {
               value: "123",
             }),
           ],
+          variants: [
+            expect.objectContaining({
+              prices: [
+                expect.objectContaining({
+                  sale_amount: 75,
+                  amount: 100,
+                }),
+              ],
+            }),
+          ],
           type: null,
           collection: null,
           type: expect.objectContaining({

packages/medusa/src/api/routes/admin/products/update-product.js

@@ -246,6 +246,7 @@ export default async (req, res) => {
               amount: Validator.number()
                 .integer()
                 .required(),
+              sale_amount: Validator.number().optional(),
             })
             .xor("region_id", "currency_code")
         ),